<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <div>
            <span>姓名:</span>
            <input type="text" v-model.trim="userName" />
        </div>
        <div>
            <span>年龄:</span>
            <input type="number" v-model.number="age" />
        </div>
        <div>
            <span>性别:</span>
            <select v-model="gender">
                <option value="男">男</option>
                <option value="女">女</option>
            </select>
        </div>
        <div>
            <button @click="add">添加/修改</button>
        </div>
        <div>
            <table border="1" cellpadding="10" cellspacing="0">
                <tr>
                    <th>序号</th>
                    <th>姓名</th>
                    <th>年龄</th>
                    <th>性别</th>
                    <th>操作</th>
                </tr>
                <tr v-for="(item,index) in arr" :key="index">
                    <td>{{index+1}}</td>
                    <td>{{item.nickName}}</td>
                    <td>{{item.age}}</td>
                    <td>{{item.gender}}</td>
                    <td>
                        <button @click="del(item.id)">删除</button>
                        <button @click="edit(item,index)">编辑</button>
                    </td>
                </tr>
            </table>
        </div>
    </div>
    <script src="../vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                userName: '',
                age: null,
                gender: '',
                arr: [
                    {
                        id: ~~(Math.random() * 1000),
                        nickName: 'Tom',
                        age: 19,
                        gender: '男'
                    },
                    {
                        id: ~~(Math.random() * 1000),
                        nickName: 'Jone',
                        age: 21,
                        gender: '女'
                    }
                ],
                isEdit: false
            },
            methods: {
                add() {
                    if (this.isEdit) {
                        // isEdit是true
                        let newArr = this.arr.filter((item) => item.id === this.id);
                        newArr[0].gender = this.gender;
                        newArr[0].nickName = this.userName;
                        newArr[0].age = this.age;
                        this.isEdit = !this.isEdit
                        this.userName = ''
                        this.age = null
                        this.gender = ''
                        this.id=''

                    } else {
                        // isEdit是false
                        if (!this.userName || !this.age || !this.gender) {
                            alert('请输入完整数据...')
                            return
                        }
                        this.arr.push({
                            id: ~~(Math.random() * 1000),
                            nickName: this.userName,
                            age: this.age,
                            gender: this.gender
                        })
                        this.userName = ''
                        this.age = null
                        this.gender = ''
                    }

                },
                edit(editItem) {
                    this.isEdit = !this.isEdit //打开编辑模式

                    this.userName = editItem.nickName
                    this.age = editItem.age
                    this.gender = editItem.gender
                    this.id = editItem.id
                },
                del(id) {
                    this.arr = this.arr.filter(item => item.id !== id)
                }
            }
        })
    </script>
</body>

</html>